Riveting device



Feb. 22, 1938. M. JOHNSTON RIVETING' DEVICE Filed Dec. 19, 1936INVENTOR:

v I HOWARD M-JOHNSTON B M ATTORNEY- Patented Feb. 22, 1938 PATENT OFFICERIVETING DEVICE Howard Milton Johnston, Toronto, Ontario, Canada,assignor to Massey-Harris Company, Limited, Toronto, Ontario, CanadaApplication December 19, 1936, Serial No. 116,832

4 Claims.

This invention relates to a riveting device and more particularly to ariveting device which may be conveniently operated in association with avise of usual construction.

It is frequently necessary for users of various types of machinery toreplace certain riveted members therein. It is usually difiicult forsuch users to effect a convenient and satisfactory riveting operationwith the type of equipment available. For instance, the replacement ofthe cutting sections in the knife of a mowing machine is necessarily asomewhat frequent operation in which difficulty is experienced.

It is thus an object of this invention to provide a simple rivetingdevice which may be operated by attachment to a vise of usualconstruction and by means of which riveting operations may be quicklyand satisfactorily carried out.

The invention will be described with reference to the accompanyingdrawing in which Figure 1 is a side elevation,

Figure 2 an end elevation, and

Figure 3 a plan of a vise with the device in place.

The riveting device will be described in association with a vise andcomprises a rigid frame adapted to be secured to a fixed jaw of the viseand carrying a riveting jaw and a lever pivoted to the frame andcarrying a cooperating riveting jaw, the lever being arranged to beactuated by a movable jaw of the vise. The riveting jaws aresubstantially offset with respect to the vise jaws whereby the forceexerted on the riveting jaws by the movable jaw of the vise through thelever is greatly increased.

In the drawing, the vise of usual construction comprises a base Isuitably anchored to a bench i, a fixed jaw 2 at one end of the base, amovable jaw 3 having an elongated rear portion 3' slidably mounted onthe base, and a screw shaft 4 adapted to move the jaw 3 in the usualmanner by means of a handle 5.

The riveting device as shown comprises a frame 6 adapted to be securedto the fixed jaw 2 as by a screw clamp l and extending laterally of thejaw, a lever 8 having a pivotal connection 9 with the extended end offrame 6, and a pair of cooperating riveting jaws Ill, one of which iscarried by the lateral extension of frame 6 and the other of which iscarried by lever 8 in substantially offset relation to the vise jaws.Lever 8 is provided with a bearing projection H arranged for engagementby the face of movable jaw 3.

Frame 6 consists of an arm l2 adapted to abut the face of jaw 2 andhaving one end I2 bent to engage one side of the jaw and through whichthe screw clamp 1 may extend, and a short angle member I3 mounted on thearm l2 and adapted to engage the other side of the jaw and form theother element of the clamp. A top plate [4 may be welded to arm l2 andextend along the top of the jaw to provide a more solid mounting of theframe on the jaw.

The pivotal connection 9 consists of a pair of U-shaped strips l6pivoted to each other adjacent their ends' by means of pins I1. One ofthe strips H is mounted on the laterally extending end of arm l2 and theother strip carries the lever 8.

It will be noted that inward movement of the movable jaw 3 willv causebearing engagement thereof with lever B and thus effect closing of theriveting jaws l0 whereby a riveting operation may be carried out.

This offset arrangement of the riveting jaws greatly increases the powerratio as between the vise jaws and the riveting jaws and makes itpossible to readily apply, by normal operation of the handle 5,suflicient force to snugly fit the rivet into place with neatly formedheads and the body thereof completely filling the hole in which therivet is placed. This latter is an important consideration in theformation of a perfect union between the two members, as for example thebar and cutting section of a mower knife and the result is a substantialimprovement over that obtained in the usual method employed.

The riveting jaws may be arranged as replaceable units. The attachmentitself? is readily mounted on and removed from the vise as required. Themovable jaw of the vise moving inwardly, as shown, leaves the centre ofgravity of the load substantially directly over the anchor point on thebench and insures accuracy of the line of movementof the parts.

I claim:

1. A riveting attachment for a vise comprising a frame, means foranchoring said frame to a vise jaw, said frame when anchored to the visejaw having a laterally extending portion, a riveting jaw on saidportion, a U-shaped bearing member secured to said portion adjacent itsouter end, a lever, a riveting jaw thereon and means for pivo-tallymounting said lever on said bearing member.

2. In a vise having a fixed and a movable jaw, a riveting attachmentcomprising a frame secured to the fixed jaw and carrying a riveting jaw,a lever spaced from said frame and carrying a second riveting jaw insubstantial alignment with said first riveting jaw, means pivoting saidlever to the frame at an intermediate point therebetween, said leverhaving engagement with the movable jaw whereby movement of the latterwill actuate the lever.

3. In a vise having a fixed and a movable jaw, a riveting attachmentcomprising a frame, means for securing the frame to the fixed jaw, saidframe when secured to the fixed jaw having a laterally extendingportion, a riveting jaw on said portion, a lever spaced from the frameand adapted to be engaged by the movable jaw, a riveting jaw on saidlever in substantial alignment with said first riveting jaw, and meanspivoting said lever to the frame at an intermediate point therebetween.

4. A riveting attachment for a vise comprising in combination with thejaws of the vise, a frame, means for anchoring said frame to one of thevise jaws, said frame when anchored to the vise jaw having a laterallyextending portion, a riveting jaw on said portion, a lever, a rivetingjaw thereon, and a pivotal connection between said portion and levercomprising a U-shaped extension on said portion at its outer end and aU-shaped extension on said lever and pivoted to said first U-shapedextension.

HOWARD MILTON JOHNSTON.

